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CVE-2026-16812 Arista CVE debrief

Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability. The vulnerability allows attackers to inject OS commands. This is an executive overview: Arista VeloCloud Orchestrator On-Prem is affected by an OS command injection vulnerability. The vulnerability class is OS command injection, which can lead to potential operational impact, including unauthorized command execution. The source confidence is based on CISA Known Exploited Vulnerabilities catalog guidance. Users of Arista VeloCloud Orchestrator On-Prem should review and apply mitigations according to vendor instructions and CISA's BOD 26-04 guidance. Apply vendor instructions and CISA guidance. Users should also confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review compensating controls for exposed systems while remediation is scheduled and verified.

Vendor
Arista
Product
VeloCloud Orchestrator (On-Prem)
CVSS
CRITICAL 10
CISA KEV
Listed
Original CVE published
2026-07-27
Original CVE updated
2026-07-27
Advisory published
2026-07-27
Advisory updated
2026-07-27

Who should care

Users of Arista VeloCloud Orchestrator On-Prem, operators, platform administrators, vulnerability management teams, and security teams should be aware of this vulnerability and take necessary actions.

Technical summary

The Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability allows attackers to inject OS commands. This vulnerability is being actively exploited. Users should apply mitigations in accordance with vendor instructions and ensure compliance with CISA's BOD 26-04 guidance.

Defensive priority

High, as it's being actively exploited.

Recommended defensive actions

  • Apply mitigations in accordance with vendor instructions
  • Ensure compliance with CISA's BOD 26-04 guidance
  • Follow CISA's Forensics Triage Requirements
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Verified via CISA Known Exploited Vulnerabilities catalog. The vulnerability is confirmed to exist in Arista VeloCloud Orchestrator On-Prem. Evidence is limited to vendor instructions and CISA guidance. Defenders should verify affected product deployments and review official advisories for scope, severity, and guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16812 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16812

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-16812 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16812

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.